Anti-PET117 cytochrome c oxidase chaperone antibodies are used for the immunodetection of the protein encoded by the PET117 gene. In humans, the canonical protein has a reported length of 81 amino acid residues and a mass of 9.2 kDa. Its subcellular localization is in the mitochondria. It is a member of the PET117 protein family. The gene encoding this protein is implicated in Mitochondrial complex IV deficiency. Other names for this target antigen include PET117 homolog, alternative protein CSRP2BP, and protein PET117 homolog, mitochondrial. Gene orthologs have been identified in the mouse, bovine, zebrafish, chimpanzee and chicken species.